Spoofing Detection in GNSS Receivers through Cross-Ambiguity Function Monitoring

Christopher Hegarty, Brady O’Hanlon, Ali Odeh, Karl Shallberg, John Flake

Abstract:	Searching for the presence of multiple peaks within the cross-ambiguity function (CAF) of a received GNSS signal against a known GNSS pseudorandom noise (PRN) code is a well-known technique to detect the presence of spoofing. However, little is available in the public literature on the performance capabilities and limitations of this technique. This paper presents a performance assessment of CAF monitoring for spoofing detection with a focus on the GPS C/A-code and L5 signals, which are the two GPS signals that will be utilized by future airborne equipment now being standardized.
Published in:	Proceedings of the 32nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2019) September 16 - 20, 2019 Hyatt Regency Miami Miami, Florida
Pages:	920 - 942
Cite this article:	Hegarty, Christopher, O’Hanlon, Brady, Odeh, Ali, Shallberg, Karl, Flake, John, "Spoofing Detection in GNSS Receivers through Cross-Ambiguity Function Monitoring," Proceedings of the 32nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2019), Miami, Florida, September 2019, pp. 920-942. https://doi.org/10.33012/2019.16986
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